Portable liquid oxygen unit



FIG. 1 is a front perspective view of an embodiment of a portable liquidoxygen unit according to our new design;

FIG. 2 is a front elevational view of the portable liquid oxygen unitshown in FIG. 1;

FIG. 3 is a rear elevational view of the portable liquid oxygen unitshown in FIG. 1;

FIG. 4 is a right side elevational view of the portable liquid oxygenunit shown in FIG. 1;

FIG. 5 is a left side elevational view of the portable liquid oxygenunit shown in FIG. 1;

FIG. 6 is a top plan view of the portable liquid oxygen unit shown inFIG. 1; and,

FIG. 7 is a bottom plan view of the portable liquid oxygen unit shown inFIG. 1.

The portions drawn in broken lines are shown for illustrative purposesonly and form no part of the claimed design.

The ornamental design for a portable liquid oxygen unit, as shown anddescribed.